Tree-cutting device.



BALEWN L A. SUNDH.

TREE CUTTING DEVCE.

1g?,347 Paented Feb. 2, T315.

5 SHEETS-SHEET k.

TREE CUTTING DEVRTE.

APPLIGATXON FILED DEC. 2.

W. D. BALDWIN L A. SUNDH.

TREE CUTTING DEVICE.

APPLICATION FILED Dnu.2,19oo.

1,127,847. Patented Feb. 2, 1915 5 SHEETS-SHBET 5.

C] Hot llc lil U NTED STATES 'PATENT oFFieE.

WILLIAM D. BALDWIN, OF NEW YORK, AND AUGUST SUNDH, OF YONKERS, NEW YORK.

TREE-CUTTING DEVICE l Specification of Letters Patent.

Patented Feb. 2, 1915.

iie, it known that. we, Wimax. l). liano ein; and i oi Susini, `eitizens of the initediFtate; .csiding in New York, eounty and Htalte of New York, vand Yonkers, in the eoiinty of Westchester and State of New York. have invented a new and useful iin- ;n'ovi-ineut in 'i`i'ee-(iittirig Deviees, of whieh the following is a specifiration.

Uur invention relates to improvements in tree-eutting devices and has for one of its ohjeets'the provision of power driven mechanisni for rittting l1 gs or trees, which is sel fcontained and of comparatively light weight so as tu he easily trans iorted from place to )lace and which is eapalile of cutting a numiier oiA trees without altering the position ol' the driving mechanism. p

Another ohjeet of our inventioiiis the provision of piactical. and .eiieientnieans for cutting large or small trees -elose to theI ground regardless of .the condition of the surrounding land, and so" arranged that a nuinher of trees may simultaneously be eut.

further object is the provision of a tree cutting devire in which the operating mech- .anisni may he'loeated at a considerable dis tance from the tree or other ohjeet to he eut,V

vtherehy making it possihle to operato on ohjeets which-would otherwise he inaeeessihle. Other ohjeets will appear hereinafter, the nevel ermhinations of elements heilig pointed out in the appended claims. i In the accompanying drawings, Figure 1 represents in side elevation, a 'practical ein` hodiment of our invention; Fig. 2 is an enlarged sectional side view of the engine and sawc['ierating meehanism'shown in Fig. i; Fig. iis a sectional plan View of Fig.y 2 upon the line Wit; Fig. "4 isa pian View of Fig. 2;' l"ig.,:'i is an end view of Fig. 2; Fight a sectifnal end view of Fig. upon the lline ('r-(3; Figs; 7 and 8 are plan and side views resi'iectively, of -a ehain saw; Fig. f)

iS a Seetionai view of Fig. 7 `u )on the line 4);9; Fig. 1'() is a plani-'iew` o a modifieation of our invention; Figs. 11,'12 and 13 are detail 'nieves of eertain parts of the apparatus shown in Fig. 10; Figs. .l5 and 14 represent in 'plan and .side views reepee tveiy, n method for preventing the saw from binding as the same ents its iva'v into the tree; Fig. 11G' s' a viei' imilar to Fig. 2 showin ain'otiifiefation. 1`r A Simi ar reference characters denote cor- Fonding parts` tli roughoutail. the figures.

Numerous devices have been proposed for,I rotting trees. stun'ips, ete., hy power driveif savv iuef-hanisin and it has been found in general that such devices have inet vvith indifferent suecos-s, and, owingt to their many viisadvantagef,us y

hie to use it u'lierel the ground is hilly orv su'azup'v. or where the trees grow elosely to gether as in a forest.

" lroadly speaking. our invention comprises a eliain sau' ivhieh ma)Y easily he swung about a tree or stump and which is given a rei-iprceaiiig inotirn h v means of an internal ci inhustiou engiiuI of light weight and .suitable intermediate mechanism.

Referring to the drawings` 10 designates au internal e,mhu-;tion or gasclene engine of thil 'ivvo-evele. two eylinder, opposed type arranged for air cooling. An engine of this deseription is |mrtirularly adapted i'or rui' purpose in that it eomhines the features of light weight, compactiiess, maximum povver for a given weight and freedom frein vibration. The engine is pri-,h-.i'ahly arranged sothat its crank shaft is in a vertical direeticn with the halanee, or ly-u'liecl uppermost as shown in Figs. l and llolted to the head of caf-h cylinder is a foot 11 wliieh may he thrust intoV the ground when the engine isset up into operating positionv` these iii-et heing for the purpose, of securely holdingr the engiinl against liodily movement when the same is in operation.

12 designates a fuel tank which is; secured to the engine at a suitahie place and'ivhich is connected oy pipingr to a arhureter or `vaporizer i3 communieating with the erank ease'of the engine. The, ignition iiiiparatus eoinprises an elet-trie generator i4 'which may he eonneeted through sui'tahle coil and rireuitr eioffing mechanism yto the highl tele sion vspark pings ifi-l5 at the end of each eylinder.

ifi designates the usual muffler which is conneeted to the exhaust ports of each oviider and whieh serves to diminish the noise ofthe enffine exhaust. Handles. designated hy I7?li', are secured to opposite sides of the crank case of the engine,"bymeans of features, their use has heen very limited and very unsatisfactory exi-cpt In`y which the latter may be readily transported from place to place.

An engine constructed in the manner set forth is entirely self-contained in that it does not require additional storage tanks for fuel or water, and at the same time will have ample power and may easily be carried from place yto place by two men 'and located in positions which would be inaccessible for heavy, cumbersome engines such as steam or electric motors.

While the above description applies Ato a prime mover of desirable construction, such construction is not essential. y

Referring more particularly to Fig. 4, 18 designates,r a spurgear which is keyed or otherwise secured to the crank shaft 27. In mesh with this gear are two gears 20 and '20 of equal size which are pivoted at 19 and 19 respectively, to the engine casing. Both-of the gears 20, 20 are provided with crank pins 21, 21 located at equi-distant points fromltheir pivots 19, 19 respectively, and these crank pins are connected by the pitmans'22., 22 to reciprocating blocks 24,

24 respectively.` The latter are dovetailed on both sides and are adapted to move in corresponding dovetailed grooves or channels 34 formed in the diverging ends of a bracket 35v secured to the engine cylinder (see Fig. 6). Each of the reciprocating blocks 24, 24', carries a shouldered stud such as 25, and upon each of thesestuds is 1 loosely mounted a sprocket wheel 26. 1t will beseen from'Fig. 4 that the crank pins 21 and 21 are set 180 degrees apartso that, as the driving gear 18 rotates, theaeciproeating blocks will move in opposite ndirec- *tions with respect to each other. 28 designates a tensionvor saw-feedinggbar which carries upon one end a sprocket Wheel 29 securely fixed against movement and ar ranged in the same ing sprockets 26 an .26. tion, 28', of thetensionbar 28, is yokeshaped and straddlesa base on the' driving gear 13, the latter acting as a guide therefor. Theother end 31 of the tension bar is screw threaded throughout and is supported by a double arm' bracket 33, 33 through which it loosely passes.` A hand wheel 32 is threaded upon this end'of the tension bar and is located between -the arms ofthe double arm bracket 33. 30 designates a sprocket chain which leads over the sprocket Wheels 26, 29 `and 26 after the manner illustratedin Fig. 4. One end of this sprocket chain is con- 4'nected to a chain saw 36'byI means of a detachable link 37 or other. suitable. fastening. The operation of the saw driving mechanism is as'follows: As the driving gear 18 is rotated by the crank shaft 27 of the engine, Vthe gears 2Dand 20 are driven. therelane as the reci rocat-'i- The midd e porl rections by means of the pitmans 22 and respectively'. Since the block 24, together with the sprocket wheel 26 connected therev to, is in its extreme left hand position as shown in Fig, 4, a rotation of the gear 'in either direction will cause the hiocr to right hand direction will cause the upperpart of the sprocket chain 30 to move in the same direction, and lsince the sprocket wheel 26 lies in a bight in the chain, the saw 36 connected thereto will move through a distance just double that of the reciprocating block 24. While one end of the 'sprocket chain 30 is moving through. a certain distance, the opposite end is moving through the same distance only in a reversev direc tion, thus, as one end of the chain is taken up the other end is paid out thereby giving the saw 36 the desired reciprocating movement. In order that the roper tension may be given the saw so that 1t will feed corvrectly the sprocket wheel 29 is bodily moved by rotating the hand wheel 32 in the proper direction. In this manner the tension or saw-feeding bar 28 may be moved so as to slacken the saw or to place it und-er any desired tension.

The saw, per .s e, is clearly".` illustrated in- Figs.. 7, 8, and 9 and comprises a series of links such as 38 which are preferably arranged after the manner ofia sprocket chain. Each link is made lof tempered steel which is notched on one edge so as to form Y saw teeth and these teeth are set or bent .outwardly as shown in Fig. 9 so that the saw may have proper clearance. links may be grouped in various Ways so as to produce a saw of any desired thickness and length, land the links are secured together by means of countersunk rivets so that the lateral faces of the complete saw will be devoid of all projections, which would tend to interferewith its proper operation when a't work.

The method of sawing a treeaor stump close to the ground is shown in Fig. 1. The

The separate engine 10 is `first located at .a Suitable pointv `inthe vicinity of the tree and the feet 11,' 11

. firmly pressed into the ground. The saw' is then ledabout the tree at a point where the cut is to be made and brought back to the sprocket chain of the saw-operating mechanism to which it is secured by the hook 37 (Figs. 2 and 4). The engine is then started and the 'saw rapidlycuts its Way through the'tree, beingr advanced or fed into the cut by the hand Wheel 32. Tn orderto guard against the engine being displaced from its position hy reaction of the saw x wir in oiafriiliiin. a hail il secured to the -i fin" hy nif'iiii. oi' wliivh the hitter muy be |`"ilii'iii tu -i .Jighl'mring tree, ilf 0r other nifihle .ftetioiiiiry olijcrt hy the use of a. hiorl; aiiil l'all aon'iprising thc blocks ft2, 42 iiiiil ropil. ln order to prevent they Saw t'rfiiii hinflii: .ire it atli'zinrics into the tree.y \-(il'\"w diri! ii-- lli, if) ('Vig. li ilh'l l-y) invii' he ilriirii into pluri, attr-r the San' him @wird il` mit i thiit the ti'eiz 'will he any @wird upright :intl rrriiii'iot lean wwr fn :its t hiinl the wir in thi', mit atri-r ilu trrrhan hren nearly cnt through. 'ihr asi iiifij: he inhoolieil anii rcinriw'l from thlA clit tinfl then by knocking ont the, iri'ilgrs th tree hill in moist nimes fall :may from thiI fiaA .Iliiir.

A 'l'lic morlifiiation ilhistratml in Fig. it) -,i 'ms a niciins for feeding the san' hrrrin thi` vngine, andsaw operating nirchanism mai' he moved bodily. The engine l() iQ prrr viflcil with grooved lng'.Q 47.y 4T which reet upon a frame 48 of T-rail construction. iii-:irlet 49 secured to the cylinilurl'iuail ot' the engine :mil also to the crank cnw of the engine hv means nf one nr more stag.' rmlf: *f* This bracket carries a long ari-ew varied rod 3l' which is guided hy the :irm bracket 33 formed integral n'ith i ir/mired to, the frame 48. A hand livel isff i5* threaded upon the rod 31 hv means iii which the engine may be moved hack and irrtli upon theiiwails to regulate the feed m' the saw, This construction dispenses with the tension bar 28 shown in Figs. 2 .and 4, also the sprocket wheel Q9. that portinn nf the chain 30 which was formerly engagf'd bv the sprocket wheel 29 being qe- 'inrcci agaiiizit; movement by any suitable ,whining means ii'ig.' 10'F shows a somewhat different arrangement whereby the apparatus is adapteili to ppeme upon a number of trees siiiriiltangonair, l0 lesignates a multipleqclmtler ggiian'eene engine of the vertical iwi-pe kiiihirh 'is arranged to drive a gear 51 thrnngh a niiinch 5&2. The gear 5l meshes with a genr' provided with a crank wir. 54 to which is connected a driving rod 55 and cable clamp 56. The latter is connected tn an endless cable 57 which runs hrnngha. pair of stationary pulley blocks @,158 minted tra trees 44', 44 somewhat remnved from each hther. Adiustahle clamps 592' 59 are seeureii to opposite leads of the nble 57 which are connected hy other cables @3,260 to the. cnfls nf the chain saw 36. A which and fall ten'ifn device 61 is inter- ;mned between one (it the cailles G0 and the Viiiiiii sara. hy means of which the tension thnvsw may he, r'gnlateii and the Same into this mit. (lt ier clamps 59', 59 are En iie manner Seciirtd m thea cable 57 and their@ ciamii are rfnmected tri an additional saw 36 provided with :i tension device 6i. In like manner fithcr saws may he opera` tively connected to the cahlc 57 so that any ilesired number (if trees may siiii'iltancriisly he, mit without alteringy the piwitiun (if thi` cahle 57 or thc driving engine ifli Iiig, l2 `Shows in ilctail une of th-l :ulivistahle clumps 5h. lt wmprises a huily por tion (3T grmirwl ti, riiit-iwe thi; ifahle .7T whirh is prfevmtrrl 'rniii flipping therein hi.' iin rcrentrir lcwr B3 pi'vritcil :it 33. 'l'he heiter riniy he inn-vwl ahi-nt itx piu/t in order to permit the chimp to he :ipplicil to thc 'fihlc 5T ifter which it i. tig'htrnefl iipifn thi` trahie and held in tightens-l pieitii n hy means of ii hook (34. 'lhv ci nniirtiiig rml .7.3 iS Scrniril tn the tlainp 5V hy means, if thc pin l ihr: clump 5f) is rriwnstriirtefl z-zimiliir tf flic lamp .3H inst dcsrrihifil rveptiiig that it if; prmiilril with :i lng l iir-ieail if the nranl( pin *i2 hy means, of wliiih a caille itldnniy hr sifrziircfl thereto.

The fiperritinn if thu apparatus illnetratefl in Ifigz. if) is at i ill-'\:f 'this riiggine l0' is irht :uct up in priwpifr periti( n :iiiil rif-- mired in phare, :in is also thc iiihle 5T and liiiillcy .hl/'wim They :fawn iii', iiiifl l iro non' hrmight to heur upm this 'armas nhirh it is ilcsirefl to cnt; flown :mil they winne, are iiionnciftefl h f the @lamps il) anti i' reVV sprrtii'cly tn the cahle 5T. .'Ylvhe ei nim' set in motion after nhl-ch this rhin i Y is-r thronn into girar so that the rotary nur tirin of the engine is transmitted through the gcars il :intl :'13 to thtf'fiiiiieitiiig rmi 57h .\:s the latter mores hack and the cahle 57 is given a reicipriiciiting mntimi whiffh mfitinn is transmitted tn the saws 2i; and iii. By manipulating ihn tainl iip ile,- ices (il and Gl the eoirespnnding ,en-ws may he properly ierl to their work :intl the :awe: will in time mit through the, ti-ers nhirh thefty :ire nperiiting upona y means of this apparatus any ilcsircil nnmlmr nf saws may he at work Siiniiltanfniifily, und a larg numl'ier of tre-ns mai,l lic saweil without ehiting the driving fable 57 :"r thai mntii'e pnwer 10.

The erifnatrnf-tion of the varifins elements or parts herein set forth to ili iliise mir iii-- ientinn muy he, rhangwi ir. iiifhiis: wayin It is therefore inteirle'l that thc appended claims not nnly rorci thc (lil'lrriviit ways Suggested hvrein if einliiirlying mir invention, lint also the many niwliii' wiwi thrria of hir-h may hr nimh.

Having rlesfl'ihcil mir inventif n. what fr f'laini :is new. :mil l'--ir-A lo www' hx Letters .lntrnt of thy (initial nieuwe ir; i

l. ln a sawing appui-:riva ihre ifiinihiniition if a i'rliiiin .--,:i\\. :i pincha chain nrcteil tu fraiil a. piiir of cpr-'ii lzvt aseouiiitetl with siiirl spiofziwt chili chain being hclil agziiiiet miV point intermediate thil f i'irrii'hii i i power driven munir; foi ircipriiniiiing mi forth l lari sprocket wheels, substantially as described.

In a sawing api'iaratns, the combination of a chainf san', :1 sprocket chain corr nected to said sa '.v, a pair of sprocket wheels associated ivith said sprocket chain, an additional sprocket wheel lying in a bight in said sproclv'et chain and lixcd against rotary movement, power driven mechanism for reciprocating said pair ol' sprocket wheels, and means for eli'ecting a bodily movement of said additional sprocket vvhecl for the purpose o t' varving the tension of said sprocket chain and sin. i

3. ln a sawing machine the combination of a chain saw, a sprocket chain connected thereto, a motor, reciprocating mechanism operatively connected with said motor and said sprocket chain, means for holding the sprocket chain stationary at one point, in its length, and means for varying the position ol' said holding means, substantially as de- 4. In a sawingvmachine; the combination ot a chain san', al sprocket chain connected thereto, a motor, 'reciprocating mechanism operatively connected tosaid motor and sprocket chain, a tension bar in fixed engagement ith said sprocket chain, and means for eilccting a movement of said tension bar to vary the tension of said saw, substantially' as described.

5. In a sawing machine, the combination of a chain saw, a sprocket chain connected thereto, means to hold part of said chain in a position, a motor, reciprocating members operatively connecting said motor and sprocket chain, to effect a reciprocating movement of the saw and means for varying the tension in said sprocket chain, substantially as described.

6. In a sawing apparatus, the combination of a motor, a pair of gears driven thereby, pitmans connecting each of said gears to a corresponding reciprocating block. a sprocket wheel secured to each of said blocks, an adjustable tension bar, a member located between the sprocket wheels and secured against movement to said tension bar, a sprocket chain associated with said sprocket wheels and member, and a chain savv connected to said sprocket chain, substantially as described.

7. In a sawing machine, the combination of an engine, a pair of gears driven by said engine, a pair of sliding blocks, pitman connections between each gear and a corresponding block, a sprocket wheel carried by each block, a chain saw, a sprocket chain connected to each end of the said saw, and arranged to be reciprocated by the said sprocket Wheels, and means associated with said sprocket chain at a point intermediate the sprocket wheels for holding the chain in fixed position and for varying the tension on the said saw.

In testimony whereof, I have signed my name to this specification .in the presence of two subscribing Witnesses.

IVM. D. BALDIVIN -Witnesses THos. M. LOGAN, IV. R. WHITE, Jr.

In testimony whereof, I have signed my name to this specification in the presence. of two subscribing witnesses.

AUGUST SUNDH. Witnesses W. H. BRADY, E. L. ANsTELLI. 

